Non-linear thermal convection in a Casson fluid flow over a horizontal plate with convective boundary condition

Journal article

Authors/Editors

Shaw, Sachin

Research Areas

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Publication Details

Author list: Shaw S, Mahanta G, Sibanda P

Publisher: Elsevier: Creative Commons Attribution Non-Commercial No-Derivatives License / Elsevier

Place: NEW YORK

Publication year: 2016

Journal: Alexandria Engineering Journal (1110-0168)

Journal acronym: ALEX ENG J

Volume number: 55

Issue number: 2

Start page: 1295

End page: 1304

Number of pages: 10

ISSN: 1110-0168

Languages: English-Great Britain (EN-GB)

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Abstract

Casson fluid flow has many practical applications such as food processing, metallurgy, drilling operations and bio-engineering operations. In this paper, we study Casson fluid flow through a plate with a convective boundary condition at the surface and quantify the effects of suction/injection, velocity ratio, and Soret and Dufour effects. Firstly we used a similarity transformation to change the governing equations to ordinary differential equations which were then solved numerically. The effect of the rheological parameters on the velocity, temperature, and concentration with skin friction, and heat and mass transfer are shown graphically and discussed briefly. It is observed that the velocity of the fluid at the surface decreases with increase of the velocity ratio while the nature of the flow is in opposite characteristics. The local Nusselt number decreases with increase in the velocity ratio. Skin friction at the surface is enhanced by buoyancy ratio and Casson number. Due to injection of the fluid in the system, the mass transfer rate at the surface increases while it decreases with the velocity ratio parameter. (C) 2016 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V.

Keywords

Casson fluid, Non-linear thermal convection, Soret and Dufour effect, Suction, viscous dissipation

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